Box staying machine



Sept. 5, 1949. M: a. STUMPF BOX STAYING MACHINE Filed Au 23, 1948 2 Sheets-Sheet 1 JNVENTOR. MICHAEL J. STUMPF ATTORNEYS M. J. STUMPF BOX STAYING MACHINE Sept. 6, 1949.

2 Sheets-Sheet 2 Filed Aug. 23, 1948 FIG. 5.

FIG. 4.

FIG. 7'.

FIG. 6.

F D, NM

.WU 9 N G J C! L '1: .E BY

. ATTORNEYS Patented Sept. 6, 1949 UNITED STATES CE BGXSEEKYING MACHINE lificl iaell. Stmfipfi fihiladelfphia, Fat, assiznor, by niesli'e assilgmne fs, to National Metal Edie Box Cfcirnpaniy;v Pfiifadelphia; P'a., a corporation of Pennsylvania Application August 23, 1948;:Seriah No; 45,766

f. This invention relates to an improvement in 60x7 staying machines, i.- e.-, machines. oifthe type adapted for the application of meta stay strips to box corners. H

Machines of the type referredto here are 613- closed, for exam le, in United States Patents Nos. 2,009,421, 11346573; 1,192,201 and 793,549.

Machines of the type contemplated comprise a die and" anvil for the application or. a stay strip to a box corner in combination means for autoiriaticalli ieedirig a; length of stay strip to the die in-each operation of the die and in which the length of stay strip cut oif and fastened toabox corner laid on the anvil.

Machines ofthe character contemplated here hav heretofore been so constructed as to be adaptable to feedrstays of ailength up to argiven maximum only. As a consequence, where, tor example, a length of'stay strip greaterthan maximum length for any given machine was desired; a separate machine was requiredl Now inaccordance with this invention there is provided a box staying; machine so constructed to" selectively feed up to normal maximum i'engths of strip or t'o' doublemaximufn length.

Having now indicated. in a enerarw'ay, the nature and purpose of this inventiomi Willi proceedlto a detailed description of. a preferred eni- Iiodiment thereof with. reference to the accompanying' drawings, in which:

Figure 1 is a side elevation, partly" broken away, of a hoxstay'i'ng iri'achiire' embodizi'ngc this invention.

Figure 21s an opposite side View, partly Broken away; of the? upper portion of the niachii'ie' shown in Figure 1. n v

Figure 3' is" a detail View of'a'n llfifit of 15112 niac'hirre I'o'okirig in' the directiofiof" arrow Figure 1.

Figures 4-8 are detail views of an element of tire machine in different" positions in opera.- tion'al" cycle. 7

Figure Qis" a detail. view of an element ofthe structure shown in Figures 4-8;

Referringv new to the several figures, the 'machine basically is or the construction as. shown, for" example, in U. S. Patent Ni'il L346,573,, iii that it comprises a frame I, fromwhicn is supported a fixed anvil? 2;.- with which is" adapted to cooperate a reciprocating die 3. Into th die is fed a length, oi metal stay strip 4, from a roll 5, supported from frame ll As is usual, the die 3 is reciprocated by a 7 motor 6, started and stopped by a foot pedal 9 and arranged to drive a shaft, mounted in frame I} through gearing; 8. The shaft T carries a crank lit, towhi ch an end of a link [I is connected; the other end of link ll being connected to an end or a lever [2 fulcrumed on bell crank M. A two armed lever f3 is pivoted one pivot [3' to lever. If. one arm Oftll level [3 is hooked for engagement wifli an arm of a bell crank lever [EL The bell crank I4 is connected to the die 3 by a I 5. The lever B will be normally held; in engagement with bell crank lever M by! [6; the connectionthus made will operate the die downwardly to close with the anvil; The die will be retracted through the operation of the link 15.

As a safety? feature a guard IT carried by the die 3 will be lifted, if in. the descent of the die the operators hands he in the path of the die. From the guard [1 extends a rod. [8,. anend of which, iii lifting of the guard, will Contact an arm of fever l3 and throw the lever cutofengag'einent with bell crank [4 thus breaking the driving c'annecubm for the die,v interrupting the downward movement of the die which is" then hel-Id by spring [9; Ilever l3 will reengage with bell" crank [4 under the influence at spring Hi in the continued rotation of shaft. 1-. During the upward movement ofthe. die a length of the stay strip 4 will be-fed to the die by means of the usual feeder device at actuated by shaft '1 through crank It andilink 2'2, and the usual cutoff mechanism (not shown)" is provided to sever the length of stay' strip asit is afiixed by the closme ofthe die withthe anvil.

New more specifically with reference tothe invention contemplated here: a lever 23 is caron the pivot If by which, the lever l3 is connected to lever f2. and on the opposite side ofl'ever lf'f iemthe lever l3.

The lever 2.3 carries a laterally extending; finger 24. Pivotally mounted= on belL crank lever IA in. operative relation telever 23 is a-cam: 25g,from the side-0E which extendpins 26 and 2 L Aspring 28, extending from hell: crank I4 overlies the cam and acts as a d'eteht.

V Mounted on Era-me t is-asupportZi'ton which is, pivotaIly mounted a/triangular finger 341, bean, which is a ten; member 3lconnected to the support 2a by a slot and pin connection and connected. to. the finger b3; a sp ing 32;

The arramgement of thecam 25 lever 23 and triangular finger 3B is such that with the stop member 3! positioned as shown in Figures 4-8, the lever 23 will, in alternate downward movement of the die 3, be actuated by the cam 25 to turn lever l3 to break its connection with bell crank lever I4, as though the safety device had been operated, with the result that the stay strip feeding mechanism will be actuated twice, with feed of a double length of stay strip for each closing of the die with the anvil. Again, the arrangement is such that by adjustment of the stop member 3I to position the triangular finger 30 as shown in Figure 9, the cam 25 will not actuate the lever 23 to break the driving connection to the die and the die will close with the anvil with normal feed of stay strip.

In more detail, with reference to Figures 4-8, where a double feed of strip is desired the stop 3| is set to position finger 30 as shown in Figure 4. With the lever 23 and cam 25 in the position shown in Figure 4, the lever I3 will be in engagement with bell crank lever I 4 and on movement of lever I2 in the direction of the arrow, Figure 4, the die will be brought down into engagement with the anvil. In the course of the descent of the die, the pin 21 on cam 25 will pass to a position beneath finger 3B, the finger being depressed against spring 32 in the passage of the pin 21'.

When the die is in closed position, the several parts will be related as shown in Figure 5.

In the opening or upward movement of the die, during which feed of a length of strip will take place, the pin 27 on cam 25 will engage finger 30 and in continued upward movement the cam will be turned by finger 30 and held by spring 28 to the position shown in Figure 6. The pin 21, in the changed position'of the cam, will pass by the end finger 30.

On com letion of the opening stroke of the die, the several parts will be in the position shown in Figure 7, in which position the cam has turned the lever 23 counterclockwise, which causes turning of the lever I 3 so that the hooked end thereof is retracted from engagement with bell crank lev r i4, thus breaking the driving connection.

Now, when the lever I2 again moves in the direction of the arrow, Figure 7, which would normally cause the die to descend. there is no downward movement of the die due to the fact that the connection between lever I2 and bell crank lever I4, normally made by lever I3, is broken. In the continued movement of the lever l2 in the direction of the arrow, Figure 7, the finger 24 on lever 23 contacts with the pin 26 on cam 25 and effects turning of the cam back to the position shown in Figure 4. The turning of the cam permits the finger 24 to pass the pin 25 in the continued movement of the lever I2, as shown in Figure 8.

In the continued movement of lever I2, in the upward stroke thereof, a second feed of strip occurs and when the lever I2 reaches its upper position, the hooked end of lever I3 is reengaged with bell crank lever I4 under the influence of spring IS, the cam 25 offering no obstruction to the turning of the lever 23 incidental to the reengagement of lever I3 with bell crank lever I4. The parts are then in the position shown in Figure 4.

It wil1 now be noted that with the finger 30 adjusted as shown in Figures 4-8, the die will close with the anvil on every other stroke of the lever l2, while, at the same time, feed of strip will take place on every upward stroke of the lever I2, so that double feed will occur on each closing of the die with the anvil.

1scribed, for example, given a machine adapted normally to feed a length of strip up to 12 inches,

where it is desired to apply a strip of 24 inches in length, a 24 inch feed of strip between closing of the die and anvil will be obtained with the above described mechanism. Half of this length will be applied in each closing of the die and anvil and the other half will be applied subsequently with the machine in normal operation without supply of strip.

While the machine in accordance with this invention has been described more particularly with reference to feed of box staying strip or for the staying of boxes, it will be understood that it is equally adaptable to the application of metal for the provision of a cutting edge, such as is provided in dispensing packages in connection with rolled paper to enable lengths to be readily drawn out and severed.

It will be appreciated that various modifications in detail may be made in the above described mechanism without departing from this invention as defined in the appended claims.

What I claim and desire to protect by Letters Patent is:

1. In a machine for applying metal strip, a die and anvil, a prime mover, a breakable driving connectionbetweenthe prime mover and the die for closing the die with the anvil, means for feeding a length of metal strip to the die in its opening movement and means for breaking the driving connection to the die in alternate opening movements of the die.

2. In a box machine, a die and anvil, a prime mover, a breakable driving connection between the prime mover and the die for closing the die with the anvil, means for feeding a length of metal strip to the die in the opening movement of the die and cam means actuated in the opening movement of the die for breaking the driving connection to the die in alternate opening movements of the die.

3. In a machine for applying metal strip, a die and anvil, a prime mover, a driving connection including a latch between the prime mover and the die for closing the die with the anvil, means for feeding a length of metal strip to the die in the opening movement of the die and cam means for opening the latch in alternate opening movements of the die.

4. In a machine for applying metal strip, a die and anvil, a prime mover, a breakable driving connection between the prime mover and the die for closing the die with the anvil, means for feeding a length of metal strip to the die in the opening movement of the die/cam means actuated in'the opening movement of the die for breaking the driving connection to the die in alternate opening movements of the die and means for rendering said cam means inoperable.

MICHAEL J. STUMIPF.

No references cited. 

